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91. 发明专利

JPH03177533A MANUFACTURE OF SINTERED MATERIAL 失效
公开(公告)号：JPH03177533A
公开(公告)日：1991-08-01
申请号：JP31713989
申请日：1989-12-06
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA
IPC分类号： B22F3/10 , C22C33/02
摘要： PURPOSE:To easily manufacture the sintered material having excellent mechanical characteristics with good productive efficiency by adding specified amounts of graphite powder and a lubricant to the powder of an alloy having a specified compsn. constituted of Mo, Cr, Mn and Fe, subjecting it to compacting and thereafter executing sintering under specified conditions. CONSTITUTION:By weight, 0.8 to 1.4% graphite powder having 200 to 350m /g specific surface area and 4 to 10mum average grain size is added to the powder of an alloy contg. 0.3 to 1.0% Mo, 0.7 to 1.2% Cr, 0.6 to 1.0% Mn and the balance substantial Fe, to which a lubricant for compacting is furthermore added by 0.5 to 1.5%, and uniform mixing is executed. The mixed powder is compacted into a prescribed shape of >=6.6g/cm density. The green compact is sintered. At this time, the state of a sintering atmospheric gas is regulated to the one contg. a reducing gas essentially consisting of an inert gas and in which the partial pressure of the reducing gas is kept >=1000 times higher than that of water. Moreover, the sintering is executed in such a manner that the green compact is heated to 1370 to 1423K in the above atmospheric gas, is held for 1800 to 3000S and is thereafter cooled at 600 to 1500K/H rate. In this way, the sintered material of high quality can be obtd. by normal sintering at a relatively low temp.

92. 发明专利

JPH02190404A PRODUCTION OF ALUMINUM MOLDED PRODUCT 失效
公开(公告)号：JPH02190404A
公开(公告)日：1990-07-26
申请号：JP1172189
申请日：1989-01-19
申请人： TOYOTA MOTOR CORP
发明人： MANABE AKIRA , SUDO SHUNTARO
IPC分类号： C22F1/04 , B22F3/24 , C22F1/00
摘要： PURPOSE:To obtain a molded product maintaining high fatigue strength even after heating by molding Al-based metal powder solidified by rapid cooling, caking the resulting molded product by sintering and carrying out shot peening. CONSTITUTION:Al-based metal powder solidified from a molten state by rapid cooling at >=10 deg.C/sec cooling rate is molded. The resulting molded product is caked by sintering by hot working and shot peening is carried out to increase the compressive residual stress. High fatigue strength is obtd., stress corrosion cracking is prevented and the weight of parts can be reduced.

93. 发明专利

JPH01191759A ALUMINUM ALLOY COMPOSITE MATERIAL 失效
公开(公告)号：JPH01191759A
公开(公告)日：1989-08-01
申请号：JP1562888
申请日：1988-01-26
申请人： TOYOTA MOTOR CORP , AISIN KEIKINZOKU KK , AISIN SEIKI
发明人： SUDO SHUNTARO , MANABE AKIRA , MURAKAMI SATORU , ISHIKAWA AKINARI
IPC分类号： C22C32/00 , C22C1/05 , C22C21/02 , C22C21/12
摘要： PURPOSE:To obtain the title material for a piston of an internal combustion engine having excellent various characteristics by dispersing and incorporating at least one kind of ceramic powder among SiC, Al2O3, SiO2 and Al2SiO3 to the matrix an Al alloy contg. specific amounts of Si, Cu and Mg. CONSTITUTION:As the material for an internal combustion engine to which light weight, high strength and wear resistance are required, the Al alloy com posite material in which the Al alloy contg., by weight, 3-12% Si, 0.5-20% Cu and 3-7% Mg is regulated to the matrix and in which at least one kind of ceramic powder among SiC, Al2O3, SiO2 and Al2SiO3 (mullite) is present by dispersion in the range of 5-20%, by volume ratio, is used. The composite material having high strength and having no lowering of strength even at the high temp. of 250-300 deg.C can be obtd.

94. 发明专利

JPH01108349A SINTERED ALLOY HAVING EXCELLENT HIGH TEMPERATURE WEAR RESISTANCE 失效
公开(公告)号：JPH01108349A
公开(公告)日：1989-04-25
申请号：JP26340587
申请日：1987-10-19
申请人： TOYOTA MOTOR CORP
发明人： MANABE AKIRA
IPC分类号： C22C38/00 , C22C38/30 , C22C38/52
摘要： PURPOSE:To obtain the titled sintered alloy formed with specific compsn. of Cr, Mo, Co, Si, C and Fe by mixing specific compsn. of Co alloy, graphite and stainless steel in the specific ratio and subjecting the mixture to green compacting and sintering. CONSTITUTION:Co alloy powder, 2-10%, by weight, consisting of 25-40% Mo, 2-10% Si, 0-20% Cr, at least one kind between Ni and Fe with the balance Co, 0-0.3% graphite powder and ferrite or martensite stainless steel powder are mixed to 100% total. Said mixed powder is subjected to compression molding and the resulted green compact is sintered. The sintering is preferably executed by heating for about 30-60min at about 1,150-1,200 deg.C in a reducing atmosphere or vacuum. By this method, the sintered alloy having the compsn. consisting of 10-18% Cr, 0.5-6% Mo, 0.4-7% Co, 0.04-1.8% Si, 0-0.3% C and

95. 发明专利

JPS62207847A FERROUS SINTERED ALLOY FOR VALVE SEAT 失效
公开(公告)号：JPS62207847A
公开(公告)日：1987-09-12
申请号：JP5199286
申请日：1986-03-10
申请人： TOYOTA MOTOR CORP
发明人： KADOTA YUKIO , MANABE AKIRA
IPC分类号： C22C38/00 , C22C38/52 , F01L3/02
摘要： PURPOSE:To obtain a ferrous sintered alloy for valve seat excellent in wear resistance and reduced in the attach upon a valve as an opposite material, by uniformly dispersing alloy grains and a solid lubricant which have specific compositions, respectively, in a ferrous-alloy matrix having a specific composition as well. CONSTITUTION:The ferrous sintered alloy for valve seat has a composition in which the alloy grains composed of Co alloy containing, by weight ratio, 10-70% Cr, 5-20% W, 5-20% Mo,

96. 发明专利

JPS62202046A MANUFACTURE OF HIGH STRENGTH SINTERED BODY 失效
公开(公告)号：JPS62202046A
公开(公告)日：1987-09-05
申请号：JP4562686
申请日：1986-03-03
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA
IPC分类号： C22C33/02 , B22F3/10
摘要： PURPOSE:To obtain the titled body without high temp. sintering and heat treatment, by heating a compact from mixed powder of iron alloy powder composed of a prescribed component compsn., graphite powder and lubricant in reducing atmosphere, cooling and reduction treating, then further pressing and sintering. CONSTITUTION:Iron powder contg. by weight 1-6% Ni or Co, 0.5-3% one kind or more among Cu, Mo, Cr, Mn, Si under the state in which Ni or Co is not completely alloyed with Fe, further the other elements are mixed or partially or completely alloyed with Fe, graphite powder and lubricant are mixed. Next, the compact from the mixed powder having 80-90% density ratio is heated in reducing atmosphere by a prescribed heating rate, cooled by a prescribed rate and reduction treated. Then the compact is pressed by >=1.05 pressing ratio under normal temp., then heated to 1,100-1,150 deg.C for 10-20min, then cooled to 400 deg.C by >=10 deg.C/min rate to obtain the aimed titled body.

97. 发明专利

JPS62202045A MANUFACTURE OF SINTERED ALLOY SUPERIOR IN HIGH TEMPERATURE WEAR RESISTANCE 失效
公开(公告)号：JPS62202045A
公开(公告)日：1987-09-05
申请号：JP4461886
申请日：1986-02-28
申请人： TOYOTA MOTOR CORP , NIPPON FUNMATSU GOKIN KK
发明人： KADOTA YUKIO , MANABE AKIRA , OBUCHI SADATAKA , ITO MASAO
IPC分类号： C22C33/02 , C22C38/00
摘要： PURPOSE:To obtain sintered alloy superior in characteristics such as high temp. strength and wear resistance, by heating and melting compact of lubricant powder such as lead and material iron powder contg. low m.p. composed of phosphide and sintering it to a prescribed porocity or below. CONSTITUTION:Mixed powder of lubricative powder of lead, manganese sulfide, etc., and material iron powder contg. low m.p. compd. such as copper phosphide, triiron monophosphide is press formed to compact (formed body). Compsn. of the material iron powder composed of alloy copper powder contg. by weight 2.5-25% Cr, 0.2-3.0% C, and the low m.p. alloy powder under 0.1-0.8% P in mixed powder is desirable. Next, the compact is heated to temp. higher than m.p. of the compact by 0-50 deg.C to carry out liquid phase sintering. Lubricative substances such as lead and manganese sulfide are dispersed in sintered alloy obtd., in such a way and wear resistance is improved without deteriorating strength of matrix under high temp.

98. 发明专利

JPS62188758A FERROUS SINTERED ALLOY FOR VALVE SEAT 失效
公开(公告)号：JPS62188758A
公开(公告)日：1987-08-18
申请号：JP23073186
申请日：1986-09-29
申请人： TOYOTA MOTOR CORP
发明人： KADOTA YUKIO , MANABE AKIRA
IPC分类号： F01L3/02 , C22C33/02 , C22C38/00 , C22C38/60
摘要： PURPOSE:To obtain a ferrous sintered alloy for valve seat excellent in wear resistance and reduced in the attack upon a valve as opposite material, by uniformly dispersing alloy grains into an iron matrix mainly composed of pearlite. CONSTITUTION:The alloy grains have a composition consisting of, by weight, 10-17% Cr, 5-20% W, 2-20% V and/or Nb,

99. 发明专利

JPS62177148A PRODUCTION OF HIGH-STRENGTH SINTERED MEMBER 失效
公开(公告)号：JPS62177148A
公开(公告)日：1987-08-04
申请号：JP1864286
申请日：1986-01-30
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA , SUDO SHUNTARO
IPC分类号： C22C33/02 , B22F3/24
摘要： PURPOSE:To produce a high-strength sintered material at a relatively low temp. by adding and mixing sintering activating powder which is formed by adding an adequate ratio of carbon to approximately the same compsn. as the compsn. of ferrous alloy powder to and with said ferrous alloy powder and molding the powder mixture then sintering the molding. CONSTITUTION:The sintering activating powder which is formed by adding 0.5-7.0% C to the same compsn. as the compsn. of the ferrous alloy powder or the compsn. approximate thereto is added and mixed to and with the ferrous alloy powder. The above-mentioned sintering activating powder is obtd. by, for example, a water atomization method, etc., and fine-grained powder sized about -100 mesh is preferably used. The above-mentioned powder mixture is then molded and sintered. The sintering is accelerated by the sintering activating powder, by which the high-strength sintered material is obtd. The above- mentioned material is preferably subjected to a heat treatment after sintering to have the higher strength. The heat treatment is adequately executed by a hardening and tempering treatment or isothermal transformation treatment.

100. 发明专利

JPS6296661A SINTERED IRON ALLOY FOR VALVE SEAT 失效
公开(公告)号：JPS6296661A
公开(公告)日：1987-05-06
申请号：JP4563086
申请日：1986-03-03
申请人： TOYOTA MOTOR CORP
发明人： KADOTA YUKIO , MANABE AKIRA
IPC分类号： C22C38/00 , C22C38/60
摘要： PURPOSE:To improve the wear resistance and to weaken the attacking property to a valve as an opposite member by uniformly dispersing alloy particles contg. prescribed percentages of Cr, W, Mo, etc., and FeMo in an Fe alloy contg. prescribed percentages of Cr, Mo, V or Mn and C. CONSTITUTION:This sintered Fe alloy is obtd. by uniformly dispersing, by weight, 5-25% alloy particles and 1-10% FeMo contg. 1-10% Mo in the matrix of an Fe alloy contg. 1-20% one or more among Cr, Mo, V and Mn and 0.5-2% C. The alloy particles consist of 10-70% Cr, 5-20% W, 5-20% Mo, 0.5-3% C,

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